22123232121 has 8 divisors (see below), whose sum is σ = 29692992064. Its totient is φ = 14651146800.

The previous prime is 22123232093. The next prime is 22123232123. The reversal of 22123232121 is 12123232122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22123232121 - 2²² = 22119037817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22123232123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24418126 + ... + 24419031.

It is an arithmetic number, because the mean of its divisors is an integer number (3711624008).

Almost surely, 2^22123232121 is an apocalyptic number.

It is an amenable number.

22123232121 is a deficient number, since it is larger than the sum of its proper divisors (7569759943).

22123232121 is a wasteful number, since it uses less digits than its factorization.

22123232121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48837311.

The product of its digits is 576, while the sum is 21.

Adding to 22123232121 its reverse (12123232122), we get a palindrome (34246464243).

Subtracting from 22123232121 its reverse (12123232122), we obtain a palindrome (9999999999).

The spelling of 22123232121 in words is "twenty-two billion, one hundred twenty-three million, two hundred thirty-two thousand, one hundred twenty-one".